1. Land-use classification map of the Colorado Springs-Castle Rock area, Front Range Urban Corridor, Colorado [cartographic material] Yale Public content 1975. 2013-06-13T13:28:34Z. 2013-06-26T19:51:04Z. Driscoll, Linda B. The Survey. English. Public. Front Range (Colo. and Wyo.), Colorado, Douglas County, Elbert County, El Paso County, Fremont County, and Teller County.